Comment 4 for bug 1641587

The validation code in function validate_multi_interface_vip() of server_mgr_validations.py should not make it mandatory to specify external vip. A contrail cluster can be deployed without an external vip on multi interface setup. There would be no option of load balancing for an external process trying to reach the server in such deployment but that doesn't make it un-usable or non-deploy able.

So the code path for both SM and SMLite should accept only internal_vip being configured from the control-data network subnet and not make it mandatory to specify an external_vip from management n/w subnet in case of multi interface setup. This flexibility is already available on fab and it does not impose any such restriction.